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-rw-r--r--kernel/drivers/power/reset/Kconfig11
-rw-r--r--kernel/drivers/power/reset/Makefile1
-rw-r--r--kernel/drivers/power/reset/at91-poweroff.c33
-rw-r--r--kernel/drivers/power/reset/at91-reset.c97
-rw-r--r--kernel/drivers/power/reset/gpio-poweroff.c25
-rw-r--r--kernel/drivers/power/reset/gpio-restart.c2
-rw-r--r--kernel/drivers/power/reset/ltc2952-poweroff.c8
-rw-r--r--kernel/drivers/power/reset/syscon-reboot.c2
-rw-r--r--kernel/drivers/power/reset/zx-reboot.c80
9 files changed, 180 insertions, 79 deletions
diff --git a/kernel/drivers/power/reset/Kconfig b/kernel/drivers/power/reset/Kconfig
index 17d93a73c..1131cf75a 100644
--- a/kernel/drivers/power/reset/Kconfig
+++ b/kernel/drivers/power/reset/Kconfig
@@ -15,7 +15,7 @@ config POWER_RESET_AS3722
This driver supports turning off board via a ams AS3722 power-off.
config POWER_RESET_AT91_POWEROFF
- bool "Atmel AT91 poweroff driver"
+ tristate "Atmel AT91 poweroff driver"
depends on ARCH_AT91
default SOC_AT91SAM9 || SOC_SAMA5
help
@@ -23,7 +23,7 @@ config POWER_RESET_AT91_POWEROFF
SoCs
config POWER_RESET_AT91_RESET
- bool "Atmel AT91 reset driver"
+ tristate "Atmel AT91 reset driver"
depends on ARCH_AT91
default SOC_AT91SAM9 || SOC_SAMA5
help
@@ -166,5 +166,12 @@ config POWER_RESET_RMOBILE
help
Reboot support for Renesas R-Mobile and SH-Mobile SoCs.
+config POWER_RESET_ZX
+ tristate "ZTE SoCs reset driver"
+ depends on ARCH_ZX || COMPILE_TEST
+ depends on HAS_IOMEM
+ help
+ Reboot support for ZTE SoCs.
+
endif
diff --git a/kernel/drivers/power/reset/Makefile b/kernel/drivers/power/reset/Makefile
index dbe06c368..096fa6704 100644
--- a/kernel/drivers/power/reset/Makefile
+++ b/kernel/drivers/power/reset/Makefile
@@ -19,3 +19,4 @@ obj-$(CONFIG_POWER_RESET_KEYSTONE) += keystone-reset.o
obj-$(CONFIG_POWER_RESET_SYSCON) += syscon-reboot.o
obj-$(CONFIG_POWER_RESET_SYSCON_POWEROFF) += syscon-poweroff.o
obj-$(CONFIG_POWER_RESET_RMOBILE) += rmobile-reset.o
+obj-$(CONFIG_POWER_RESET_ZX) += zx-reboot.o
diff --git a/kernel/drivers/power/reset/at91-poweroff.c b/kernel/drivers/power/reset/at91-poweroff.c
index 9847cfb7e..e9e24df35 100644
--- a/kernel/drivers/power/reset/at91-poweroff.c
+++ b/kernel/drivers/power/reset/at91-poweroff.c
@@ -10,6 +10,7 @@
* warranty of any kind, whether express or implied.
*/
+#include <linux/clk.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of.h>
@@ -48,6 +49,7 @@ static const char *shdwc_wakeup_modes[] = {
};
static void __iomem *at91_shdwc_base;
+static struct clk *sclk;
static void __init at91_wakeup_status(void)
{
@@ -119,9 +121,10 @@ static void at91_poweroff_dt_set_wakeup_mode(struct platform_device *pdev)
writel(wakeup_mode | mode, at91_shdwc_base + AT91_SHDW_MR);
}
-static int at91_poweroff_probe(struct platform_device *pdev)
+static int __init at91_poweroff_probe(struct platform_device *pdev)
{
struct resource *res;
+ int ret;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
at91_shdwc_base = devm_ioremap_resource(&pdev->dev, res);
@@ -130,6 +133,16 @@ static int at91_poweroff_probe(struct platform_device *pdev)
return PTR_ERR(at91_shdwc_base);
}
+ sclk = devm_clk_get(&pdev->dev, NULL);
+ if (IS_ERR(sclk))
+ return PTR_ERR(sclk);
+
+ ret = clk_prepare_enable(sclk);
+ if (ret) {
+ dev_err(&pdev->dev, "Could not enable slow clock\n");
+ return ret;
+ }
+
at91_wakeup_status();
if (pdev->dev.of_node)
@@ -140,6 +153,16 @@ static int at91_poweroff_probe(struct platform_device *pdev)
return 0;
}
+static int __exit at91_poweroff_remove(struct platform_device *pdev)
+{
+ if (pm_power_off == at91_poweroff)
+ pm_power_off = NULL;
+
+ clk_disable_unprepare(sclk);
+
+ return 0;
+}
+
static const struct of_device_id at91_poweroff_of_match[] = {
{ .compatible = "atmel,at91sam9260-shdwc", },
{ .compatible = "atmel,at91sam9rl-shdwc", },
@@ -148,10 +171,14 @@ static const struct of_device_id at91_poweroff_of_match[] = {
};
static struct platform_driver at91_poweroff_driver = {
- .probe = at91_poweroff_probe,
+ .remove = __exit_p(at91_poweroff_remove),
.driver = {
.name = "at91-poweroff",
.of_match_table = at91_poweroff_of_match,
},
};
-module_platform_driver(at91_poweroff_driver);
+module_platform_driver_probe(at91_poweroff_driver, at91_poweroff_probe);
+
+MODULE_AUTHOR("Atmel Corporation");
+MODULE_DESCRIPTION("Shutdown driver for Atmel SoCs");
+MODULE_LICENSE("GPL v2");
diff --git a/kernel/drivers/power/reset/at91-reset.c b/kernel/drivers/power/reset/at91-reset.c
index ca461ebc7..3f6b5dd7c 100644
--- a/kernel/drivers/power/reset/at91-reset.c
+++ b/kernel/drivers/power/reset/at91-reset.c
@@ -1,5 +1,5 @@
/*
- * Atmel AT91 SAM9 SoCs reset code
+ * Atmel AT91 SAM9 & SAMA5 SoCs reset code
*
* Copyright (C) 2007 Atmel Corporation.
* Copyright (C) BitBox Ltd 2010
@@ -11,6 +11,7 @@
* warranty of any kind, whether express or implied.
*/
+#include <linux/clk.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of_address.h>
@@ -46,6 +47,7 @@ enum reset_type {
};
static void __iomem *at91_ramc_base[2], *at91_rstc_base;
+static struct clk *sclk;
/*
* unless the SDRAM is cleanly shutdown before we hit the
@@ -123,6 +125,15 @@ static int at91sam9g45_restart(struct notifier_block *this, unsigned long mode,
return NOTIFY_DONE;
}
+static int sama5d3_restart(struct notifier_block *this, unsigned long mode,
+ void *cmd)
+{
+ writel(cpu_to_le32(AT91_RSTC_KEY | AT91_RSTC_PERRST | AT91_RSTC_PROCRST),
+ at91_rstc_base);
+
+ return NOTIFY_DONE;
+}
+
static void __init at91_reset_status(struct platform_device *pdev)
{
u32 reg = readl(at91_rstc_base + AT91_RSTC_SR);
@@ -155,13 +166,13 @@ static void __init at91_reset_status(struct platform_device *pdev)
static const struct of_device_id at91_ramc_of_match[] = {
{ .compatible = "atmel,at91sam9260-sdramc", },
{ .compatible = "atmel,at91sam9g45-ddramc", },
- { .compatible = "atmel,sama5d3-ddramc", },
{ /* sentinel */ }
};
static const struct of_device_id at91_reset_of_match[] = {
{ .compatible = "atmel,at91sam9260-rstc", .data = at91sam9260_restart },
{ .compatible = "atmel,at91sam9g45-rstc", .data = at91sam9g45_restart },
+ { .compatible = "atmel,sama5d3-rstc", .data = sama5d3_restart },
{ /* sentinel */ }
};
@@ -169,11 +180,11 @@ static struct notifier_block at91_restart_nb = {
.priority = 192,
};
-static int at91_reset_of_probe(struct platform_device *pdev)
+static int __init at91_reset_probe(struct platform_device *pdev)
{
const struct of_device_id *match;
struct device_node *np;
- int idx = 0;
+ int ret, idx = 0;
at91_rstc_base = of_iomap(pdev->dev.of_node, 0);
if (!at91_rstc_base) {
@@ -181,80 +192,66 @@ static int at91_reset_of_probe(struct platform_device *pdev)
return -ENODEV;
}
- for_each_matching_node(np, at91_ramc_of_match) {
- at91_ramc_base[idx] = of_iomap(np, 0);
- if (!at91_ramc_base[idx]) {
- dev_err(&pdev->dev, "Could not map ram controller address\n");
- return -ENODEV;
+ if (!of_device_is_compatible(pdev->dev.of_node, "atmel,sama5d3-rstc")) {
+ /* we need to shutdown the ddr controller, so get ramc base */
+ for_each_matching_node(np, at91_ramc_of_match) {
+ at91_ramc_base[idx] = of_iomap(np, 0);
+ if (!at91_ramc_base[idx]) {
+ dev_err(&pdev->dev, "Could not map ram controller address\n");
+ return -ENODEV;
+ }
+ idx++;
}
- idx++;
}
match = of_match_node(at91_reset_of_match, pdev->dev.of_node);
at91_restart_nb.notifier_call = match->data;
- return register_restart_handler(&at91_restart_nb);
-}
-static int at91_reset_platform_probe(struct platform_device *pdev)
-{
- const struct platform_device_id *match;
- struct resource *res;
- int idx = 0;
+ sclk = devm_clk_get(&pdev->dev, NULL);
+ if (IS_ERR(sclk))
+ return PTR_ERR(sclk);
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- at91_rstc_base = devm_ioremap_resource(&pdev->dev, res);
- if (IS_ERR(at91_rstc_base)) {
- dev_err(&pdev->dev, "Could not map reset controller address\n");
- return PTR_ERR(at91_rstc_base);
+ ret = clk_prepare_enable(sclk);
+ if (ret) {
+ dev_err(&pdev->dev, "Could not enable slow clock\n");
+ return ret;
}
- for (idx = 0; idx < 2; idx++) {
- res = platform_get_resource(pdev, IORESOURCE_MEM, idx + 1 );
- at91_ramc_base[idx] = devm_ioremap(&pdev->dev, res->start,
- resource_size(res));
- if (!at91_ramc_base[idx]) {
- dev_err(&pdev->dev, "Could not map ram controller address\n");
- return -ENOMEM;
- }
+ ret = register_restart_handler(&at91_restart_nb);
+ if (ret) {
+ clk_disable_unprepare(sclk);
+ return ret;
}
- match = platform_get_device_id(pdev);
- at91_restart_nb.notifier_call =
- (int (*)(struct notifier_block *,
- unsigned long, void *)) match->driver_data;
+ at91_reset_status(pdev);
- return register_restart_handler(&at91_restart_nb);
+ return 0;
}
-static int at91_reset_probe(struct platform_device *pdev)
+static int __exit at91_reset_remove(struct platform_device *pdev)
{
- int ret;
-
- if (pdev->dev.of_node)
- ret = at91_reset_of_probe(pdev);
- else
- ret = at91_reset_platform_probe(pdev);
-
- if (ret)
- return ret;
-
- at91_reset_status(pdev);
+ unregister_restart_handler(&at91_restart_nb);
+ clk_disable_unprepare(sclk);
return 0;
}
-static struct platform_device_id at91_reset_plat_match[] = {
+static const struct platform_device_id at91_reset_plat_match[] = {
{ "at91-sam9260-reset", (unsigned long)at91sam9260_restart },
{ "at91-sam9g45-reset", (unsigned long)at91sam9g45_restart },
{ /* sentinel */ }
};
static struct platform_driver at91_reset_driver = {
- .probe = at91_reset_probe,
+ .remove = __exit_p(at91_reset_remove),
.driver = {
.name = "at91-reset",
.of_match_table = at91_reset_of_match,
},
.id_table = at91_reset_plat_match,
};
-module_platform_driver(at91_reset_driver);
+module_platform_driver_probe(at91_reset_driver, at91_reset_probe);
+
+MODULE_AUTHOR("Atmel Corporation");
+MODULE_DESCRIPTION("Reset driver for Atmel SoCs");
+MODULE_LICENSE("GPL v2");
diff --git a/kernel/drivers/power/reset/gpio-poweroff.c b/kernel/drivers/power/reset/gpio-poweroff.c
index e5332f1db..be3d81ff5 100644
--- a/kernel/drivers/power/reset/gpio-poweroff.c
+++ b/kernel/drivers/power/reset/gpio-poweroff.c
@@ -48,6 +48,7 @@ static void gpio_poweroff_do_poweroff(void)
static int gpio_poweroff_probe(struct platform_device *pdev)
{
bool input = false;
+ enum gpiod_flags flags;
/* If a pm_power_off function has already been added, leave it alone */
if (pm_power_off != NULL) {
@@ -57,25 +58,15 @@ static int gpio_poweroff_probe(struct platform_device *pdev)
return -EBUSY;
}
- reset_gpio = devm_gpiod_get(&pdev->dev, NULL);
- if (IS_ERR(reset_gpio))
- return PTR_ERR(reset_gpio);
-
input = of_property_read_bool(pdev->dev.of_node, "input");
+ if (input)
+ flags = GPIOD_IN;
+ else
+ flags = GPIOD_OUT_LOW;
- if (input) {
- if (gpiod_direction_input(reset_gpio)) {
- dev_err(&pdev->dev,
- "Could not set direction of reset GPIO to input\n");
- return -ENODEV;
- }
- } else {
- if (gpiod_direction_output(reset_gpio, 0)) {
- dev_err(&pdev->dev,
- "Could not set direction of reset GPIO\n");
- return -ENODEV;
- }
- }
+ reset_gpio = devm_gpiod_get(&pdev->dev, NULL, flags);
+ if (IS_ERR(reset_gpio))
+ return PTR_ERR(reset_gpio);
pm_power_off = &gpio_poweroff_do_poweroff;
return 0;
diff --git a/kernel/drivers/power/reset/gpio-restart.c b/kernel/drivers/power/reset/gpio-restart.c
index edb327efe..829b45f42 100644
--- a/kernel/drivers/power/reset/gpio-restart.c
+++ b/kernel/drivers/power/reset/gpio-restart.c
@@ -78,7 +78,7 @@ static int gpio_restart_probe(struct platform_device *pdev)
}
gpio_restart->restart_handler.notifier_call = gpio_restart_notify;
- gpio_restart->restart_handler.priority = 128;
+ gpio_restart->restart_handler.priority = 129;
gpio_restart->active_delay_ms = 100;
gpio_restart->inactive_delay_ms = 100;
gpio_restart->wait_delay_ms = 3000;
diff --git a/kernel/drivers/power/reset/ltc2952-poweroff.c b/kernel/drivers/power/reset/ltc2952-poweroff.c
index 1e0819555..15fed9d8f 100644
--- a/kernel/drivers/power/reset/ltc2952-poweroff.c
+++ b/kernel/drivers/power/reset/ltc2952-poweroff.c
@@ -158,7 +158,6 @@ static irqreturn_t ltc2952_poweroff_handler(int irq, void *dev_id)
HRTIMER_MODE_REL);
} else {
hrtimer_cancel(&data->timer_trigger);
- /* omitting return value check, timer should have been valid */
}
return IRQ_HANDLED;
}
@@ -202,16 +201,15 @@ static int ltc2952_poweroff_init(struct platform_device *pdev)
return ret;
}
- data->gpio_trigger = devm_gpiod_get(&pdev->dev, "trigger", GPIOD_IN);
+ data->gpio_trigger = devm_gpiod_get_optional(&pdev->dev, "trigger",
+ GPIOD_IN);
if (IS_ERR(data->gpio_trigger)) {
/*
* It's not a problem if the trigger gpio isn't available, but
* it is worth a warning if its use was defined in the device
* tree.
*/
- if (PTR_ERR(data->gpio_trigger) != -ENOENT)
- dev_err(&pdev->dev,
- "unable to claim gpio \"trigger\"\n");
+ dev_err(&pdev->dev, "unable to claim gpio \"trigger\"\n");
data->gpio_trigger = NULL;
}
diff --git a/kernel/drivers/power/reset/syscon-reboot.c b/kernel/drivers/power/reset/syscon-reboot.c
index d3c7d245a..7d0d269a0 100644
--- a/kernel/drivers/power/reset/syscon-reboot.c
+++ b/kernel/drivers/power/reset/syscon-reboot.c
@@ -88,4 +88,4 @@ static struct platform_driver syscon_reboot_driver = {
.of_match_table = syscon_reboot_of_match,
},
};
-module_platform_driver(syscon_reboot_driver);
+builtin_platform_driver(syscon_reboot_driver);
diff --git a/kernel/drivers/power/reset/zx-reboot.c b/kernel/drivers/power/reset/zx-reboot.c
new file mode 100644
index 000000000..a5b009673
--- /dev/null
+++ b/kernel/drivers/power/reset/zx-reboot.c
@@ -0,0 +1,80 @@
+/*
+ * ZTE zx296702 SoC reset code
+ *
+ * Copyright (c) 2015 Linaro Ltd.
+ *
+ * Author: Jun Nie <jun.nie@linaro.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/notifier.h>
+#include <linux/of_address.h>
+#include <linux/platform_device.h>
+#include <linux/reboot.h>
+
+static void __iomem *base;
+static void __iomem *pcu_base;
+
+static int zx_restart_handler(struct notifier_block *this,
+ unsigned long mode, void *cmd)
+{
+ writel_relaxed(1, base + 0xb0);
+ writel_relaxed(1, pcu_base + 0x34);
+
+ mdelay(50);
+ pr_emerg("Unable to restart system\n");
+
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block zx_restart_nb = {
+ .notifier_call = zx_restart_handler,
+ .priority = 128,
+};
+
+static int zx_reboot_probe(struct platform_device *pdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+ int err;
+
+ base = of_iomap(np, 0);
+ if (!base) {
+ WARN(1, "failed to map base address");
+ return -ENODEV;
+ }
+
+ np = of_find_compatible_node(NULL, NULL, "zte,zx296702-pcu");
+ pcu_base = of_iomap(np, 0);
+ if (!pcu_base) {
+ iounmap(base);
+ WARN(1, "failed to map pcu_base address");
+ return -ENODEV;
+ }
+
+ err = register_restart_handler(&zx_restart_nb);
+ if (err)
+ dev_err(&pdev->dev, "Register restart handler failed(err=%d)\n",
+ err);
+
+ return err;
+}
+
+static const struct of_device_id zx_reboot_of_match[] = {
+ { .compatible = "zte,sysctrl" },
+ {}
+};
+
+static struct platform_driver zx_reboot_driver = {
+ .probe = zx_reboot_probe,
+ .driver = {
+ .name = "zx-reboot",
+ .of_match_table = zx_reboot_of_match,
+ },
+};
+module_platform_driver(zx_reboot_driver);